package priv.mill.http;

import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.junit.Test;

public class HttpClientDemo {

	/**
	 * 无参数Get请求
	 * 
	 * @throws Exception
	 */
	@Test
	public void testGet() throws Exception {
		// 创建一个httpclient对象
		CloseableHttpClient httpClient = HttpClients.createDefault();

		// 创建一个GET对象
		HttpGet get = new HttpGet("http://httpbin.org/get");

		// 执行请求
		CloseableHttpResponse response = httpClient.execute(get);

		// 取响应的结果
		int statusCode = response.getStatusLine().getStatusCode();

		System.out.println(statusCode);

		HttpEntity entity = response.getEntity();

		String string = EntityUtils.toString(entity, "utf-8");

		System.out.println(string);

		// 关闭httpclient
		response.close();

		httpClient.close();

	}

	/**
	 * 带参数的Get请求
	 * 
	 * @throws Exception
	 */
	@Test

	public void doGetWithParam() throws Exception {

		// 创建一个httpclient对象
		CloseableHttpClient httpClient = HttpClients.createDefault();

		// 创建一个uri对象
		URIBuilder uriBuilder = new URIBuilder("http://httpbin.org/get");
		uriBuilder.addParameter("query", "花千骨");

		HttpGet get = new HttpGet(uriBuilder.build());

		// 执行请求
		CloseableHttpResponse response = httpClient.execute(get);

		// 取响应的结果
		int statusCode = response.getStatusLine().getStatusCode();

		System.out.println(statusCode);
		HttpEntity entity = response.getEntity();

		String string = EntityUtils.toString(entity, "utf-8");

		System.out.println(string);

		// 关闭httpclient
		response.close();
		httpClient.close();

	}

	@Test

	public void doPost() throws Exception {

		CloseableHttpClient httpClient = HttpClients.createDefault();

		// 创建一个post对象
		HttpPost post = new HttpPost("http://httpbin.org/post");

		// 执行post请求
		CloseableHttpResponse response = httpClient.execute(post);

		String string = EntityUtils.toString(response.getEntity());

		System.out.println(string);

		response.close();

		httpClient.close();

	}

	/**
	 * 带参数的post请求
	 * @throws Exception
	 */
	@Test

	public void doPostWithParam() throws Exception {

		CloseableHttpClient httpClient = HttpClients.createDefault();

		// 创建一个post对象

		HttpPost post = new HttpPost("http://httpbin.org/post");

		// 创建一个Entity。模拟一个表单

		List<NameValuePair> kvList = new ArrayList<>();

		kvList.add(new BasicNameValuePair("username", "zhangsan"));

		kvList.add(new BasicNameValuePair("password", "123"));

		// 包装成一个Entity对象

		StringEntity entity = new UrlEncodedFormEntity(kvList, "utf-8");

		// 设置请求的内容

		post.setEntity(entity);

		// 执行post请求

		CloseableHttpResponse response = httpClient.execute(post);

		String string = EntityUtils.toString(response.getEntity());

		System.out.println(string);

		response.close();

		httpClient.close();

	}
}
